129240634318 has 16 divisors (see below), whose sum is σ = 205383075120. Its totient is φ = 60783999616.

The previous prime is 129240634307. The next prime is 129240634349. The reversal of 129240634318 is 813436042921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1037788 + ... + 1155631.

It is an arithmetic number, because the mean of its divisors is an integer number (12836442195).

Almost surely, 2^129240634318 is an apocalyptic number.

129240634318 is a deficient number, since it is larger than the sum of its proper divisors (76142440802).

129240634318 is a wasteful number, since it uses less digits than its factorization.

129240634318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195171.

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 129240634318 in words is "one hundred twenty-nine billion, two hundred forty million, six hundred thirty-four thousand, three hundred eighteen".